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4DThinker

Tool Changer Survey.

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I'm looking for data on how many unique bits a CNC operator uses for a typical job they run. 

 

I  do mostly joinery cutting and use at most 2 bits and usually only one. 

The occasional 3D cut will use an end mill for roughing and a ball nose for finish.  2.

Flat 2D/2.5D cuts may use a V-bit for v-carving or inlay, and maybe a downcut spiral end mill for first passes and an upcut spiral end mill for the rest. 

 

So I'd say I average 1.4 bits per use, or 2 hole bits.

 

How many bits do you use on average for your CNC projects?   Just the number for each individual board clamped to the CNC.

 

Thanks for participating!

 

4D

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1, occasionally 2.  I'm doing a 2D job now that requires 4.

 

David

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If you use a router for any part of your woodworking then the number of bits you might use for a single job would still be of interest to me.  Before I had a CNC I might use 3 or 4 router bits in a hand held router or a router mounted in a table with a fence for one furniture project. 

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I have some files that I need 5 or 6 bits but the norm is 3 or 4.  Most of the time I try to limit the number of bits to save bit change time but it all depends on how much the smaller bits have to cut.

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I use the same bits for 90% for what I do.

 

1/4 end mill - for roughing and pocket cutting

1/8 end mill - for profiling and pocket cutting

1/8 ball nose 

3/16 ball nose (thanx 4d for that tip using these)

1/4 ball nose (occasionally)

90 deg - for Vcarving (most of the time)

60 deg - for Vcarving (some of the time)

 

I know I can use a larger bit for clearing and some carving but then it's kind of hard to get the finish bit at the same level and there's usually a ridge of some kind.  Plus you got to know how to do it.  I kind of got into a groove of what works for me and pretty much stick to it.  I get better detail using the smaller bits and can run the machine while I do other things.  I don't care if it takes a little longer.

 

Typical cut is one bit to rough cut, 1 to finish cut, 1 to Vcarve, and 1 to profile.  Usually 3 or 4 tool changes total.

 

What I do need is to find an extra long shank 1/8" ball nose and end mill to cut thru 1 1/2" material and still have room for them on my stock gantry height.

 

Edited by honesttjohn

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On 9/8/2017 at 6:45 PM, 4DThinker said:

router for any part of your woodworking then the number of bits you might use for a single job would still be of interest to me.

 

up to 7...

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